CN210325463U

CN210325463U - Transformer for station

Info

Publication number: CN210325463U
Application number: CN201921859296.7U
Authority: CN
Inventors: 邢镇云; 薛福明; 张华友; 孙冲; 顾赟; 仝德伍; 周博; 刘秋燕
Original assignee: JIANGSU SIEYUAN HERTZ INSTRUMENT TRANSFORMER CO Ltd
Current assignee: JIANGSU SIEYUAN HERTZ INSTRUMENT TRANSFORMER CO Ltd
Priority date: 2019-10-31
Filing date: 2019-10-31
Publication date: 2020-04-14
Anticipated expiration: 2029-10-31

Abstract

The utility model relates to a transformer technical field specifically discloses a transformer is used in station, including casing, ware body part and insulation support, insulation support fixes in the top of casing, and insulation support's top is equipped with once leads electrical drainage, and ware body part sets up in the casing, and the ware body includes high-voltage coil, low-voltage coil, iron core, side shielding and end shield, and the high-voltage coil snare is established in low-voltage coil's the outside, and the low-voltage coil is established the outside of iron core, side shield and set up the both ends at the iron core, end shield and set up the below at the iron core, and the iron core passes through the iron core folder to be fixed on the casing, and the outer disc of high-voltage coil is the inclined plane that reduces gradually from inside to outside, and high-voltage coil is. The utility model discloses transformer is used in station novel structure adopts the structure of mutual-inductor to realize the function and the effect of transformer, has reduced the volume of transformer, is applicable to the power supply of miniaturation, has reduced the manufacturing cost of transformer, can realize great transformation ratio simultaneously.

Description

Transformer for station

Technical Field

The utility model relates to a transformer technical field, concretely relates to transformer is used in station specifically is a gas insulation transformer is used in station.

Background

Generally, a transformer is a device for changing an AC voltage or current by using an electromagnetic induction phenomenon. Traditional transformer generally adopts oil-immersed insulation structure, and this type of transformer has bulky, the structure is heavy, easily ageing, easily takes place the conflagration danger, anti space electromagnetic interference ability is poor, electric insulation is low, the iron core loss is big, local discharge volume is big itself, shortcomings such as equipment cost height, is difficult for being used for the power supply of minizone moreover, so we want the utility model a small, the structure is arranged rationally, low in manufacturing cost, be applicable to the gas insulated transformer of the power supply of minizone.

SUMMERY OF THE UTILITY MODEL

The utility model aims to solve the technical problem that to prior art not enough, provide a small-size gas-insulated transformer for station, the structure that adopts the mutual-inductor reaches the function of transformer, is applicable to the power supply of village, mill that transformer substation and ground adult are little.

In order to solve the technical problem, the utility model provides a transformer is used in station, including casing, ware body and insulation support, insulation support fixes the top of casing, insulation support's top is equipped with once electrically conductive row, ware body part sets up in the casing, a serial communication port, the ware body includes high-voltage coil, low-voltage coil, iron core, side shielding and end shielding, the high-voltage coil snare is established the outside of low-voltage coil, the low-voltage coil is established the outside of iron core, the side shielding sets up the both ends of iron core, end shielding sets up the below of iron core, the iron core passes through the iron core folder and fixes in the casing, the outer disc of high-voltage coil is the inclined plane that reduces gradually from inside to outside, high-voltage coil with once electrically conductive row connects.

Further, the station transformer further comprises a tap switch, the tap switch is arranged on the outer wall of the shell, and the tap switch is connected with the high-voltage coil.

Further, high-voltage coil twines on high-voltage insulation section of thick bamboo, high-voltage insulation section of thick bamboo cover is established the outside of low-voltage coil, low-voltage coil twines in the outside of low-voltage insulation section of thick bamboo, low-voltage insulation section of thick bamboo cover is established the outside of iron core, low-voltage coil is spiral winding.

Furthermore, the shell is further provided with a secondary wiring end, an inflation valve and a pressure release device, the low-voltage coil is connected with the secondary wiring end, and the inflation valve is provided with a density relay.

Specifically, the bottom of the insulating sleeve is fixed with the shell through the end enclosure, a shielding electrode is arranged on the inner side of the bottom of the insulating sleeve, and the shielding electrode is fixed on the end enclosure.

Further, the bottom shield is fixed to the core clamp.

The utility model has the advantages that: the transformer for the gas insulation station has novel structure, realizes the power and the action of the transformer by adopting the structure of the mutual inductor, reduces the volume of the transformer, is suitable for small-range power supply, reduces the manufacturing cost of the transformer, and can realize larger transformation ratio; the high-voltage coil with the pagoda structure on the transformer body has the advantages of uniform voltage distribution and good insulating property, the low-voltage winding with the layered transposition structure is adopted, the air passage is additionally arranged, so that the winding loss is reduced, the heat dissipation performance is improved, and compared with an oil-immersed transformer, the risk of flammability is reduced.

Drawings

In order to more clearly illustrate the technical solution of the present invention, the drawings needed for the description of the embodiments or the prior art will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art that other drawings can be obtained according to the drawings without creative efforts.

Fig. 1 is a schematic structural diagram of the station transformer of the present invention;

fig. 2 is a partial cross-sectional view of a body portion of the station transformer of the present invention.

In the figure: 1-shell, 2-body, 3-insulating sleeve, 4-primary conducting bar, 5-end enclosure, 6-shielding electrode, 7-tap switch, 8-secondary terminal, 9-inflation valve, 10-density relay, 11-pressure release device, 21-high-voltage coil, 22-low-voltage coil, 23-iron core, 24-side shield, 25-bottom shield and 26-iron core clamp.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings, and obviously, the described embodiments are only some embodiments, not all embodiments, of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by a person of ordinary skill in the art without creative efforts belong to the protection scope of the present invention.

In the specific embodiment of the utility model, as shown in fig. 1-2, the utility model discloses a transformer is used in station specifically, including casing 1, ware body 2 and insulation support 3, insulation support 3's top is equipped with once leads electrical drainage 4, insulation support 3 fixes casing 1's top, insulation support 3's bottom pass through head 5 with casing 1 is fixed, insulation support 3's bottom inboard is equipped with shielding electrode 6, shielding electrode 6 is fixed on the head 5.

The transformer body 2 is arranged in the shell 1, the transformer body 2 comprises a high-voltage coil 21, a low-voltage coil 22, an iron core 23, side shields 24 and bottom shields 25, the high-voltage coil 21 is sleeved outside the low-voltage coil 22, the low-voltage coil 22 is sleeved outside the iron core 23, the side shields 24 are arranged at two ends of the iron core 23, the bottom shields 25 are arranged below the iron core 23, the iron core 23 is fixed in the shell 1 through an iron core clamp 26, and the iron core 23 is a high-permeability iron core; the bottom shield is fixed on the iron core clamp. Preferably, high voltage coil 21 twines on high voltage insulation section of thick bamboo, high voltage insulation section of thick bamboo cover is established the outside of low voltage coil 22, low voltage coil 22 twines in the outside of low voltage insulation section of thick bamboo, low voltage insulation section of thick bamboo cover is established the outside of iron core 23. Because the transformation ratio of the transformer for the station is larger than that of a conventional transformer, the outer circular surface of the high-voltage coil 21 is an inclined surface which is gradually reduced from inside to outside and is used for uniform electric field distribution; the low-voltage coil 22 adopts spiral windings, and because the spiral windings are connected with a plurality of wires in parallel, the wires can be divided into two groups, so that a double-spiral structure is formed, and air passages can be arranged between winding layers or between turns to increase the heat dissipation performance. The low-voltage coil needs to adopt a mode of a modified lead or lead transposition due to high current, so that the eddy current loss is reduced.

The station transformer further comprises a tap switch 7, the tap switch 7 is arranged on the outer wall of the shell 1, the tap switch 7 is connected with the high-voltage coil 21, and the tap switch is used for adjusting the transformation ratio.

Still be equipped with secondary wiring end 8, inflation valve 9 and pressure release 11 on the casing 1, low pressure coil 22 with secondary wiring end 8 is connected, be equipped with density relay 10 on the inflation valve 9, inflation valve 9 is used for inflating gas in to the casing, density relay 10 is used for detecting the inside gaseous pressure of casing, pressure release 11 is used for releasing the gas in the casing when casing internal pressure is too high.

The foregoing is a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, a plurality of improvements and decorations can be made without departing from the principle of the present invention, and these improvements and decorations are also considered as the protection scope of the present invention.

Claims

1. The utility model provides a transformer for station, includes casing, ware body and insulation support, insulation support fixes the top of casing, insulation support's top is equipped with once leads electrical drainage, ware body part sets up in the casing, its characterized in that, the ware body includes high-voltage coil, low-voltage coil, iron core, side shielding and end shielding, the high-voltage coil snare is established the outside of low-voltage coil, the low-voltage coil cover is established the outside of iron core, the side shielding sets up the both ends of iron core, end shielding sets up the below of iron core, the iron core passes through the iron core to be fixed in the folder, the outer disc of high-voltage coil is the inclined plane that reduces gradually from inside to outside, high-voltage coil with once lead electrical drainage and connect.

2. The station transformer according to claim 1, further comprising a tap changer disposed on an outer wall of the housing, the tap changer being connected to the high voltage coil.

3. The station transformer according to claim 1, wherein the high voltage winding is wound around a high voltage insulating cylinder, the high voltage insulating cylinder is sleeved outside the low voltage winding, the low voltage winding is wound around a low voltage insulating cylinder, the low voltage insulating cylinder is sleeved outside the iron core, and the low voltage winding is a spiral winding.

4. The station transformer of claim 1, wherein the housing further comprises a secondary terminal, an inflation valve and a pressure release device, the low voltage coil is connected to the secondary terminal, and the inflation valve is provided with a density relay.

5. The station transformer according to claim 1, wherein the bottom of the insulating sleeve is fixed to the housing through a sealing head, and a shielding electrode is arranged on the inner side of the bottom of the insulating sleeve and fixed to the sealing head.

6. A station transformer according to claim 1, wherein said bottom shield is secured to said core clamp.